Abstract of heat transfer coefficient modelation in single-phase systems inside pipes

Abstract

It is a widespread practice and recommended in a large part of the literature on the subject to perform the calculation of the average heat transfer coefficients in single phase media using the expressions of Or the improved version of Sieder -Tate This procedure is a necessity for many project calculations or evaluation of industrial facilities. However, these expressions have a high dispersion value of the obtained results to the real values of the systems analyzed, being in the literature consulted errors of the order of % 25 . In the 1960s, [1], at the Moscow Institute of Energy, an equation was obtained, which was derived basically from experimental point adjustments, which were later implemented at the Analogy of Prandtl. The equation obtained is known in the specialized literature as Petukhov equation, in recognition of the leader of the research group that developed this important research for the science of the term convective transference. This equation reduces the absolute mean error as a function of the number of Prandtl, so that: % 10 200 Pr %